移动app接口编程技术－学习实现之PHP 字符串

<code><span>$str</span>=<span>'hello'</span>;
<span>echo</span><span>"str is <span>$str</span>"</span>; //运行结果: str is hello
<span>echo</span><span>'str is $str'</span>; //运行结果: str is <span>$str</span></code>

<code><span><span><?php </span><span>$i</span>=<span>'I'</span>;
<span>$love</span>=<span>' Love'</span>;
<span>$you</span>=<span>' You'</span>;
<span>//连接一下三个字符串</span><span>echo</span><span>$i</span>.<span>$love</span>.<span>$you</span>;
<span>?></span></span></span></code>

<code><span><span><span><?php </span><span>//</span><span>$str</span>=<span>"      空格要去掉      "</span>;

<span>echo</span><span>"jar"</span>.trim(<span>$str</span>).<span>"len"</span>.<span>"<br>"</span>;

<span>echo</span><span>"jar"</span>.ltrim(<span>$str</span>).<span>"len"</span>.<span>"<br>"</span>;

<span>echo</span><span>"jar"</span>.rtrim(<span>$str</span>).<span>"len"</span>.<span>"<br>"</span>;

<span>?></span></span></span></span></code>